Sunan an Nasai
276
Sahih+2

It was narrated that 'Aishah said:"The Prophet (ﷺ) would put his head out for me while he was performing I'tikaf [1] and I would wash it, when I was menstruating." [1] Mujawir ("next door") here means while performing I'tikaf

SahihAbu Ghuddah
SahihAl-Albani